Proto-North Caucasian: *Hirǯ_V
Meaning: thick, dense
Notes: Reconstructed for the PEC level. The original root structure was *Hirǯ_V, with sporadic metatheses typical for adjectival stems. Most languages do not use class prefixes with this root, so prefixation in some Tsezian languages, as well as Khin. b- is apparently secondary.
